Antenna



FIG. 1 is a top, front and left side perspective view of an antenna showing my new design;

FIG. 2 is an elevational view thereof, taken from the front of FIG. 1;

FIG. 3 is an enlarged top plan view thereof;

FIG. 4 is an enlarged front elevational view thereof;

FIG. 5 is an enlarged bottom plan view thereof; and

FIG. 6 is an enlarged side elevational view thereof.

The vertical elements are broken away in FIGS. 2, 4 and 6 for ease of illustration. 

The ornamental design for an antenna, as shown and described. 